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15 June 1999 hA. <br /> Y <br /> AGE=NC:ProjectNo. 98'0534 <br /> Page__9 of 13' <br /> `or-a pre-clear_ied one-inth:diameter, 0.01 slotted screen. Each ground water sample will-be extracted t . <br /> by loweririg a Teflon.bailei through the hollow center of the_push rods into the screened section. <br /> Samples will be. collected -in labaiaiory-supplied, 40-m1 VOA `vials containing :0.5-m1 of <br /> hydrochloric acid as sample preservative and.into a 1'-liter arhberbottle lacking the preservative. The <br /> _ iatieled 'vials will be placed in a chilled container under:ice and.transported under:chain-of-custody".';: <br /> . f <br /> to.a DHS-certifled laboratory r - - - - <br /> '4.1:3:, Equipment Decontamination_ <br /> Prior to use,all sampling tools used for sample collection will be_thoroughIy rinsed<wrtli clean water. <br /> ,. <br /> after -being washed with--a�solution of Alconox.' All prohing rods will be,cleaned prior to -r.4 � '" <br /> advancement at each probe boring locatrJ. <br /> on- - �- <br /> 4.1.4:. Boring Abandonriient <br /> _ - - <br /> _ <br /> All probe borings will be' ermanently sealed to'prevent vertical-migration of contaminants.'Soil, _ <br /> - . borings shall be abandoned by backfillrngwi'th portland frorri-the'total depth to'surface grade: <br /> 4.2... .rNSTALLATION"OF GROUND WATER MONITORING WELLS s <br /> f A y ' } <br /> 4.2.1: Soil Sampling Procedures _ <br /> Soil borings will.be advartced using hollow=stem auger drilling.techniques Soil samples will be '{ • ` <br /> collected from each sail boxing at five-foot intervals: Relatively undisturbed soil samples will.be: <br /> collected in each ofthe'boririgs using a California modified split-spoon.sampler.fated with 2-inch <br />- - ` <br /> diameter,;6-inch long brass sleeves. Upon removal from the sampler, the sample sleeves will be_ _= <br /> separated with a clean.soiI knife;The exposed ends of the second sleeve will be covered'with Teflon <br /> sheets;capped and sealed.with tape.:Soilssampled in the:borings will be visually.classifidd by.an <br /> AGE.geologist in accordance-with-the Unifed Soil Clas`sification`System(USCS):Additionally' sorl'''� <br /> samples will be field screened for the presence of volatile organic compounds usingan organic vapor <br /> - meter(OVM), equipped with.a photo ionization detector(PID). Soil sample'descriptions and OVM-= <br /> readings will be recorded on a log 'for each boring i' <br /> - - _ Following sample collection; each preserved'sarnple sleeve will be-label' d with the boring location, <br /> depth;'time, date and sampler's:initials Appropriately sealed and-labeled samples will be placed in <br /> a chilled container under ice and transported,under`chain of-custody brocedure to;a DHS-certified 7 <br /> laboratory. _ 7 ' l <br /> 21 <br /> -AAanced GeoEnvironmental,Inc. ' <br />